Differential-axle device.



M. MABKARIAN. DIFFERENTIAL AXLE DEVICE. APPLIOATIOK FILED JULY 21, 1909.

I 964,038. Patented July 12, 1910.

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MELKON MARKARIAN, 0F FRESNO, CALIFORNIA.

DIFFERENTIAL-AXLE DEVICE.

Specification of Letters Patent.

Patented July 12, 1910.

Application filed July 21, 1909. Serial No. 508,758.

To all whom it may concern:

Be it known that I, MELKON MARKARIAN, a naturalized citizen of theUnited States, residing at the city of Fresno, county of Fresno, Stateof California, have invented new and useful Improvements inDifferential-Axle Devices, of which the following is a specification.

It is the object of my invention to connect the parts of an axle withoutthe use of bolts, screws or rivets and in such manner that the usual jarupon such axle does not have any effect upon the members of the boxwhich connects the parts of the axle to cause them to accidentallyseparate or to crystallize and break.

Another object is to provide a device of this character of simpleconstruction, and with the maximum amount of strength at. the pointwhere the ends of the axles meet.

I accomplish these objects by the differential axle described herein andillustrated in the accompanying drawings forming a part hereof in whichFigure 1 is a longitudinal section of the bearing with portions of theaxle shown in elevation.

My coupling is composed of an outer sleeve 5 and an inner sleeve dividedinto three parts, one of these parts 6 is shrunk upon one of thesections 7 of the axle, or the same may be forced thereon by a pressuresufiicient to hold the parts together by frictional engagement. Thisportion of the inner sleeve projects beyond the section 7 a sufficientdistance to provide a good bearing for the end of the other section 8 ofthe axle which has a working fit in the projecting end of this part ofthe inner sleeve. The outer sleeve is shrunk upon this section of theinner sleeve, or the two parts are forced together with sufficientpressure to hold them in place by their frictional engagement under thestrain required. The next section 9 of inner sleeve has a working fitwithin the outer sleeve and is shrunk upon the section 8 of the axle, orpressed thereon with sufiicient pressure to hold the parts together byfrictional engagement. The third section 10 is provided with a workingfit around section 8 of the axle and is secured within the other end ofthe outer sleeve by having said sleeves shrunk there on, or they may bepressed together with suflicient pressure to hold the parts together byfrictional engagement.

In the construction of my device I preferably use a heavy steel pipe forthe outer sleeve and a lighter steel pipe for the inner sleeve. The pipefor the inner sleeve is cut to suitable lengths and is of an externaldiameter to be secured within the outer sleeve as hereinbeforespecified. That portion which is to be used as a rotating part wouldhave to be slightly dressed on the outside so as to give it a workingfit within the outer sleeve when assembled. In the drawings thoseportions of the axle within the outer sleeve are shown dressed so thatthe part 8 shall have a working fit within those portions of the innersleeve that are rigidly secured to the outer sleeve. If desired,however, the axle need not be reduced, and in such case it would benecessary to ream those portions of the inner sleeve within which thepart 8 rotates to a working fit around the axle. By this construction itwill be observed that the meeting point be tween the ends of the dividedaxle is at a point where the maximum strength is obtained in thecoupling. It will also be observed that great simplicity and cheapnessof construction are obtained.

Having described my invention what I claim is,

In a difierential axle device, mechanism to secure the ends of a dividedaxle comprising a coupling formed of outer and inner sleeves; the innersleeve being formed of three sections, one of the outer portions of theinner section being secured by frictional engagement a portion of itslength upon one of the ends of the divided axle and being secured byfrictional engagement completely within the outer sleeve, the otherouter por tion of the inner sleeve being secured by frictionalengagement within the other end of the outer sleeve, the middle portionof the engagement upon the other portion of the In Witness that I claimthe foregoing I divided aXle near its meeting end with the have hereuntosubscribed my name this 14th first section, said second section of theaxle day of July, 1909.

having a Working fit Within those portions MELKON MARKARIAN. 5 of theinner sleeve which are rigidly secured Witnesses:

to the outer sleeve and Which surround said G. E. HARPHAM,

last section of the axle. S. B. AUSTIN.

